Trouble Shooting - Yunca Gas MEZZO Operations, Maintenance & Warranty Information

Hanging patio heater
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Flame Failure – Re-ignition
If the established flame signal is lost while the burner is operating, the control will
respond within 0.8 seconds. The HV spark will be energised for a trial for ignition
period in an attempt to relight the burner. If the burner does not light the control will
de-energize the gas valve. If the burner does not relight the control will go into
lockout as noted above in "Failure to light". If flame is re-established, normal
operation resumes.

TROUBLE SHOOTING

Fault Conditions
ERROR MODE
Internal Control Failure
Flame Sense Fault
Ignition Lockout
The LED will flash on for ¼ second, then off for ¼ second during a fault condition.
The pause between fault codes is 3 seconds.
Proper Electrode Location
Proper location of the electrode assembly is important for optimum system
performance. The electrode assembly be located so that the tips are inside the
flame envelope and about ½ inch (1cm) above the base of the flame (Fig 6).
CAUTIONS
1. Ceramic insulators should not be in or close to the flame
2. Electrode assemblies should not be adjusted or disassembled. Electrodes
should have a gap spacing of 3.1 +/- 0.8mm. If this spacing is not correct, the
assembly must be replaced. Electrodes are NOT field adjustable.
3. Exceeding the temperature limits can cause nuisance lockouts and premature
electrode failure.
Injector Sizes:
GAS TYPE
NATURAL
L.P.G.
Page 9 of 12
LED indication
Steady on
2 flashes
3 Flashes
Fig 6
MAIN JET
2.80mm diameter
1.60mm diameter
Mezzo Hanging Patio Heater
PILOT JET
0.35mm diameter
0.23mm diameter
29/10/10

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